Interesting. Did something similar with a self hosted version of geoguesser with my friends. We set it up right near our school. We have multiple routes walking home and the amount of precision we could get was insane. One of my friends was able to get only a few meters off from the original position almost instantly.

I hosted it here if anyone wants to try https://geoguess.alexmehta.xyz/createmap (advanced map and draw your boundaries).

I found it more fun than Back of Your hand just because I frankly don't remember too many streets but can recognize the overall area from walks I go on.